84844381 has 2 divisors, whose sum is σ = 84844382. Its totient is φ = 84844380.

The previous prime is 84844373. The next prime is 84844423. The reversal of 84844381 is 18344848.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49632025 + 35212356 = 7045^2 + 5934^2 .

It is a cyclic number.

It is not a de Polignac number, because 84844381 - 2³ = 84844373 is a prime.

It is a super-2 number, since 2×84844381² = 14397137974546322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (84844321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42422190 + 42422191.

It is an arithmetic number, because the mean of its divisors is an integer number (42422191).

Almost surely, 2^84844381 is an apocalyptic number.

It is an amenable number.

84844381 is a deficient number, since it is larger than the sum of its proper divisors (1).

84844381 is an equidigital number, since it uses as much as digits as its factorization.

84844381 is an evil number, because the sum of its binary digits is even.

The product of its digits is 98304, while the sum is 40.

The square root of 84844381 is about 9211.1009656827. The cubic root of 84844381 is about 439.4144777148.

The spelling of 84844381 in words is "eighty-four million, eight hundred forty-four thousand, three hundred eighty-one".